Are boy smarter than girls in math?

Answer 1

No. It all depends on your intelligence level. Just because your classes smartest kid is a boy doesnt mean they all are. Whoever says that is being pretty sexist. I am a girl myself and people even admit to me that I am the smartest kid in math. Surprisingly enough, my teacher even uses all my work as examples and uses my good intelligence as an example to the class.
At some ages, in some cultures, girls show superior mental abilities in mathematics. At other times, there appears to be no difference.

The fact that almost all historical mathematicians were men does not indicate that women were less intelligent, only that the societies were dominated by males, as most are even today. Only rarely (notably in royal families) were women able to reach their intellectual potential. In some areas of the world, even the education of women is still fiercely resisted.
"In 1980 two Johns Hopkins University researchers tried to settle the eternal nature/ nurture debate. Julian Stanley - who is well respected for his work with precocious math students of both sexes - and Camilla Benbow had tested 10,000 talented seventh-and eighth-graders between 1972 and 1979. Using the Scholastic Aptitude Test, in which math questions are meant to measure ability rather than knowledge, they discovered distinct sex differences. While the verbal abilities of the males and females hardly differed, twice as many boys as girls scored over 500 (on a scale of 200 to 800) on mathematical ability; at the 700 level, the ratio was 14 to 1. The conclusion: males have inherently superior mathematical reasoning ability." From:http://www.time.com/time/magazine/article/0,9171,953389,00.html

Answer 2

It depends on how hard you try and how good you are at it.